Lightning Clash Royale WikiThe Lightning is a spell card available from Arena 1.  The cost for the Lightning is 6 Elixir and its duration is 1.5 seconds. At Level 1 it makes 650 damage and 260 Crown Tower damage, and is upgraded up to 1254 damage and 502 Crown Tower damage. The Lightning is mainly used to lower the health of the troops with high hitpoints, but also for troops such as the Barbarians and the Witch. The Lightning is a godsend when the opponents Tower is almost destroyed, so when you hit the Lightning it will finish it off. Clash Royale describes the Lightning as: “Bolts of lightning hit up to 3 enemy troops or buildings with the most hitpoints in the target area. Reduced damage to Crown Towers.”